// ==UserScript==
// @name         Hack Wayground
// @author       Trần Bảo Ngọc
// @description  Hack Wayground/quizizz
// @namespace    http://tampermonkey.net/
// @match        https://wayground.com/*
// @grant        GM_xmlhttpRequest
// @grant        unsafeWindow
// @grant        GM_addStyle
// @run-at       document-end
// @icon         https://blackarch.org/images/logo/ba-logo.png
// @version      4.0
// @downloadURL https://update.greasyfork.icu/scripts/554337/Hack%20Wayground.user.js
// @updateURL https://update.greasyfork.icu/scripts/554337/Hack%20Wayground.meta.js
// ==/UserScript==
(function() {
    'use strict';
    const BL = ['playerExited','playerResumed','infractionType','extensionDetected','windowResizeDetected','rightClickDetected','pasteDetected'],
          blocked = d => typeof d === 'string' && BL.some(k => d.includes(k)),
          _fetch = window.fetch, _xhrSend = XMLHttpRequest.prototype.send, _parse = JSON.parse;

    window.fetch = async function(...a) {
        return a[1]?.body && blocked(a[1].body) ? new Response('{"success":true}', {status:200}) : _fetch.apply(this, a);
    };
    XMLHttpRequest.prototype.send = function(b) {
        if (blocked(b)) {
            Object.defineProperties(this, {readyState:{value:4,configurable:1},status:{value:200,configurable:1}});
            return this.onreadystatechange?.();
        }
        _xhrSend.apply(this, arguments);
    };
    JSON.parse = function(...a) {
        const r = _parse.apply(this, a);
        if (r?.type === 'RN_APP_STATE_CHANGE' && r.value === 'background') r.value = 'foreground';
        return r;
    };

    const stop = e => e.stopImmediatePropagation();
    'visibilitychange blur mouseleave pagehide resize contextmenu copy paste fullscreenchange webkitfullscreenchange'
        .split(' ').forEach(e => (window.addEventListener(e, stop, !0), document.addEventListener(e, stop, !0)));

    const def = (o, p, v) => { try { Object.getOwnPropertyDescriptor(o, p)?.configurable !== !1 && Object.defineProperty(o, p, {get:()=>v, configurable:!0}) } catch{} },
          el = () => document.documentElement;
    for (const o of [Document.prototype, document]) {
        def(o, 'visibilityState', 'visible'); def(o, 'hidden', !1);
        def(o, 'fullscreenElement', el); def(o, 'webkitFullscreenElement', el);
    }
    window.onblur = document.onblur = null;
    document.hasFocus = () => !0;

    window.addEventListener('keydown', e => {
        if (e.key === 'F2') (document.fullscreenElement ? document.exitFullscreen() : document.documentElement.requestFullscreen()).catch(() => {});
    }, !0);
    GM_addStyle(`
        #solver-panel{position:fixed;bottom:20px;left:20px;z-index:999999;padding:12px;background:rgba(26,27,30,.85);backdrop-filter:blur(10px);border-radius:16px;box-shadow:0 8px 30px rgba(0,0,0,.4);min-width:260px;max-width:320px;border:1px solid rgba(255,255,255,.1)}
        #solver-status{color:#fff;font-size:15px;font-weight:600;margin-bottom:10px;transition:.3s;text-align:left;word-wrap:break-word;white-space:normal}
        #pin-container{display:flex;gap:8px}
        #pin-input{flex:1;border:1px solid rgba(255,255,255,.2);background:rgba(0,0,0,.3);color:#fff;border-radius:8px;padding:8px 12px;font-size:14px;outline:0;text-align:center;transition:.2s}
        #pin-input:focus{border-color:#a78bfa}
        #load-btn{background:linear-gradient(135deg,#a78bfa,#8b5cf6);border:0;border-radius:8px;color:#fff;font-weight:600;padding:0 20px;cursor:pointer;transition:.2s}
        #load-btn:hover{transform:scale(1.05)}
        #load-btn:disabled{cursor:not-allowed;background:#555}
        *{user-select:text!important;-webkit-user-select:text!important}
    `);

    const cache = new Map();
    let lastQid = '';
    const clean = t => t?.replace(/<\/?p>/g, '').trim().replace(/\s+/g, ' ') || '';

    const $ = s => document.querySelector(s);
    const $$ = s => [...document.querySelectorAll(s)];

    function findGamePin() {
        const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT);
        let node;
        while (node = walker.nextNode()) {
            const m = node.nodeValue.trim().match(/\b(\d{4})\s(\d{4})\b/);
            if (m && node.parentElement?.offsetParent !== null) return m[0].replace(/\s/g, '');
        }
        return null;
    }

    async function fetchAnswers(pin, status) {
        status.textContent = '🌀 Đang tải đáp án...';
        status.style.color = '#fff';
        try {
            const res = await _fetch(`https://api.quizit.online/quizizz?pin=${pin}`);
            if (!res.ok) throw new Error(`API: ${res.status}`);
            const data = await res.json();
            const list = data.answers || data.data?.answers;
            if (!list?.length) throw new Error('Không có đáp án từ API');

            for (const item of list) {
                const id = item.id || item._id;
                if (!id) continue;
                if (item.type === 'OPEN') { cache.set(id, '📝 Tự luận'); continue; }
                if (item.type === 'MSQ' && Array.isArray(item.answers)) {
                    const ans = item.answers.map(a => clean(a.text)).filter(Boolean);
                    if (ans.length) cache.set(id, ans);
                } else {
                    const ans = clean(item.answers?.[0]?.text);
                    if (ans) cache.set(id, ans);
                }
            }
            if (!cache.size) throw new Error('Đáp án rỗng');
            return true;
        } catch (e) {
            status.textContent = `❌ ${e.message}`;
            status.style.color = '#ff5555';
            return false;
        }
    }

    function getQuestion() {
        const container = $('[data-quesid]');
        if (!container) return null;
        const qid = container.dataset.quesid;
        const options = $$('.option.is-selectable').map(el => ({
            text: clean(el.querySelector('.option-text-inner, .text-container')?.innerText),
            element: el,
        }));
        if (options.length) return { qid, type: 'CHOICE', options };
        if ($('input.question-input, textarea.question-input, input[type="text"], textarea'))
            return { qid, type: 'BLANK' };
        return null;
    }

    function autoSubmit() {
        setTimeout(() => {
            const btn = $$('button').find(b => b.innerText.trim().toLowerCase() === 'submit')
                     || $('.submit-button-wrapper button, button.submit-btn');
            if (btn && !btn.disabled) btn.click();
        }, 350);
    }

    function solve(answer, q) {
        if (q.type === 'CHOICE') {
            const targets = Array.isArray(answer) ? answer : [answer];
            targets.forEach(t => {
                const opt = q.options.find(o => o.text === t);
                if (opt) { opt.element.style.border = '4px solid #00FF00'; opt.element.click(); }
            });
            if (Array.isArray(answer)) autoSubmit();
        } else if (q.type === 'BLANK') {
            const input = $('input.question-input, textarea.question-input, input[type="text"], textarea');
            if (input) {
                input.value = answer;
                input.dispatchEvent(new Event('input', { bubbles: true }));
                autoSubmit();
            }
        }
    }

    function mainSolver(status) {
        if (!cache.size) return;
        const q = getQuestion();
        if (!q?.qid) return;
        const ans = cache.get(q.qid);
        if (ans) {
            const display = Array.isArray(ans) ? ans.join('<br>') : ans;
            status.innerHTML = `💡 Đáp án:<div style="margin-top:5px;color:#50fa7b;font-weight:400">${display}</div>`;
            if (typeof ans === 'string' && ans.startsWith('📝')) return;
            solve(ans, q);
        } else {
            status.textContent = '❓ Không tìm thấy đáp án';
            status.style.color = '#ff5555';
        }
    }

    function startObserver(status) {
        new MutationObserver(() => {
            const qid = $('[data-quesid]')?.dataset.quesid;
            if (qid && qid !== lastQid) { lastQid = qid; setTimeout(() => mainSolver(status), 500); }
        }).observe(document.body, { childList: !0, subtree: !0 });
    }

    function init() {
        if ($('#solver-panel')) return;
        document.body.insertAdjacentHTML('beforeend', `
            <div id="solver-panel">
                <div id="solver-status">🔎 Đang tìm Room Code...</div>
                <div id="pin-container">
                    <input type="text" id="pin-input" placeholder="Chờ chút...">
                    <button id="load-btn">Tải</button>
                </div>
            </div>`);

        const btn = $('#load-btn'), input = $('#pin-input'), status = $('#solver-status'), pinBox = $('#pin-container');

        const handleLoad = async () => {
            const pin = input.value.trim().replace(/\s/g, '');
            if (!pin) return;
            btn.disabled = input.disabled = true;
            if (await fetchAnswers(pin, status)) {
                pinBox.style.display = 'none';
                status.textContent = '🚀 Sẵn sàng! Đang chờ câu hỏi...';
                status.style.color = '#fff';
                startObserver(status);
            } else btn.disabled = input.disabled = false;
        };

        btn.addEventListener('click', handleLoad);
        input.addEventListener('keydown', e => e.key === 'Enter' && handleLoad());

        const finder = setInterval(() => {
            const pin = findGamePin();
            if (pin) {
                clearInterval(finder);
                input.value = pin;
                status.textContent = '✅ Đã tìm thấy Room Code';
                status.style.color = '#50fa7b';
                setTimeout(handleLoad, 500);
            }
        }, 1000);
        setTimeout(() => clearInterval(finder), 20000);
    }

    window.addEventListener('load', () => setTimeout(init, 1000));
})();